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Outlook Webview URL changes #154

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Outlook Webview URL changes #154

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9c8990a
Condition for Outlook WebView URL Registry Change
Jun 14, 2021
96209b3
Removed unnecessary whitespaces
Jun 14, 2021
d63e86f
Breaking the config
humpalum Jul 26, 2021
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5 changes: 3 additions & 2 deletions sysmonconfig-export.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -80,7 +80,7 @@
code signatures to validate, but Sysmon does not support that. Look into AppLocker/WindowsDeviceGuard for whitelisting support. -->

<!--DATA: UtcTime, ProcessGuid, ProcessID, Image, FileVersion, Description, Product, Company, CommandLine, CurrentDirectory, User, LogonGuid, LogonId, TerminalSessionId, IntegrityLevel, Hashes, ParentProcessGuid, ParentProcessId, ParentImage, ParentCommandLine, RuleName-->
<RuleGroup name="" groupRelation="or">
<RuleGroup name="" groupRelation="or"
<ProcessCreate onmatch="exclude">
<!--SECTION: Microsoft Windows-->
<CommandLine condition="begin with"> "C:\Windows\system32\wermgr.exe" "-queuereporting_svc" </CommandLine> <!--Windows:Windows error reporting/telemetry-->
Expand Down Expand Up @@ -647,6 +647,7 @@
<!--Office-->
<TargetObject name="T1137" condition="contains">Microsoft\Office\Outlook\Addins\</TargetObject> <!--Microsoft:Office: Outlook add-ins, access to sensitive data and often cause issues-->
<TargetObject name="T1137" condition="contains">Office Test\</TargetObject> <!-- Microsoft:Office: Persistence method [ http://www.hexacorn.com/blog/2014/04/16/beyond-good-ol-run-key-part-10/ ] | Credit @Hexacorn -->
<TargetObject name="Suspicious,ChangedURLOutlook" condition="contains all">\Software\Microsoft\Office\;\Outlook\WebView\;URL</TargetObject> <!-- The URL shouldn't be changed all that often and could enable persistance for hackers | @humpelpum [ https://speakerdeck.com/heirhabarov/hunting-for-persistence-via-microsoft-exchange-server-or-outlook?slide=70 ]-->
<TargetObject name="Context,ProtectedModeExitOrMacrosUsed" condition="contains">Security\Trusted Documents\TrustRecords</TargetObject> <!--Microsoft:Office: Monitor when "Enable editing" or "Enable macros" is used | Credit @OutflankNL | [ https://outflank.nl/blog/2018/01/16/hunting-for-evil-detect-macros-being-executed/ ] -->
<!--IE-->
<TargetObject name="T1176" condition="contains">Internet Explorer\Toolbar\</TargetObject> <!--Microsoft:InternetExplorer: Machine and user [ Example: https://www.exterminate-it.com/malpedia/remove-mywebsearch ] -->
Expand Down Expand Up @@ -1156,4 +1157,4 @@
<!--Cannot be filtered.-->

</EventFiltering>
</Sysmon>
</Sysmon>